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    Question

    What is the main gas involved in global

    warming?
    A Nitrogen Correct Answer Incorrect Answer
    B Oxygen Correct Answer Incorrect Answer
    C Carbon dioxide Correct Answer Incorrect Answer
    D Hydrogen Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    Carbon dioxide (COâ‚‚) is a major greenhouse gas contributing to global warming.

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